Number of unimodal functions f:[n]->[2n].

A226012

Number of unimodal functions f:[n]->[2n].

Terms

    a(0) =1a(1) =2a(2) =16a(3) =161a(4) =1716a(5) =18832a(6) =210574a(7) =2385644a(8) =27290916a(9) =314537894a(10) =3646709616a(11) =42483615330a(12) =496908084660

External references